US6054998A - Document display system for displaying documents set in fonts not native to a display device - Google Patents
Document display system for displaying documents set in fonts not native to a display device Download PDFInfo
- Publication number
- US6054998A US6054998A US08/968,962 US96896297A US6054998A US 6054998 A US6054998 A US 6054998A US 96896297 A US96896297 A US 96896297A US 6054998 A US6054998 A US 6054998A
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- United States
- Prior art keywords
- character
- information
- skeleton
- document
- shape
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T11/00—2D [Two Dimensional] image generation
- G06T11/20—Drawing from basic elements, e.g. lines or circles
- G06T11/203—Drawing of straight lines or curves
Definitions
- the present invention relates to a document display system that rapidly displays documents set in fonts not native to a display device that forms part of the system.
- the system requires that relatively few data be transferred to the display device to enable the document to be displayed in the non-native fonts.
- At least one type of font for displaying letters, numbers, or symbols (characters) corresponding to every language description desired by a user is required for document display using a computer.
- the characters to be displayed are specified by character codes, such as the ASCII or ANSI character codes.
- a code of 65 the ASCII code for the letter A
- the appearance of the displayed characters depends on the font in which the characters is displayed.
- the word font as used in this disclosure is a character set unified by typeface and size. Typefaces such as Courier and Helvetica exist for the Roman alphabet used in the English language. These typefaces may be available in a variety of point sizes, such as 8pt., 10pt., 12pt, etc. Typefaces such as Mincho and Gothic exist for the Japanese language.
- mainframe computers or medium-sized computers such as desktop computers are usually provided with a broad selection of different fonts.
- memory size limitations in small-sized computers, such as portable computers mean that only a few fonts can be provided. This is especially problematical in computers that operate in languages such as Japanese or Chinese in which the character set expressed in each font is composed of a very large number of characters. In such languages, a single font can occupy most of the available memory.
- the problem just described can be eliminated by including font information in the document data.
- the receiving apparatus is to display the document in the same fonts as those used to display the document on the sending apparatus, the receiving apparatus must be provided with a large memory to store a large variety of fonts. Small computers, such as portable computers, may lack the memory capacity for this.
- a document created on the sending apparatus includes special characters not normally used by the user of the receiving apparatus.
- the document created on the sending apparatus may include characters of a language that is foreign to the user of the receiving apparatus.
- the French character ç, the German character a and the Spanish character n do not exist in the ASCII character set.
- the user of the receiving apparatus cannot completely display the document or can only display parts of the document unless the font or fonts provided in the receiving apparatus include the special characters.
- a document can be completely reproduced by increasing the character set represented in each font, but this requires additional memory. Providing additional memory to store rarely-used special characters can be regarded as in inefficient use of such additional memory.
- the document can be transferred as a set of bitmaps, one bitmap for each character of the document.
- the number of data required to represent the document is much greater than the number of data required to represent the document using character codes. Therefore, when transferring documents as bitmaps, the transfer takes a long time and the user experiences a long delay between the start of the document transfer and the time when the document is finally displayed on the receiving apparatus. Moreover, the document transfer can consume a considerable fraction of the transmission bandwidth of the network, which slows other network traffic. Editing the document at the receiving apparatus is difficult because the characters that have been converted into bitmaps require character recognition software to convert the bitmaps back to character codes. Such software is complex and may be subject to recognition errors.
- What is needed is a document display system capable of displaying a document in a receiving apparatus in the same font as that in which the document was displayed in the sending apparatus even if the fonts for displaying the characters forming the document are not provided at the receiving apparatus.
- What is also needed is a document display system in which a document can be displayed on a receiving apparatus at high speed with a small amount of data transfer and that can display special characters without significantly reducing the display speed or increasing the amount of data transfer.
- the invention provides a document display system that comprises a first character shape generator, a first display and a first transmitter in a first terminal device; and a first receiver, a second character shape generator and a second display in a second terminal device.
- the first character shape generator generates the character shapes of characters constituting at least part of a document.
- the character shapes are generated in response to skeleton information and in response to shape generation information that includes information representing a typeface.
- the first display displays the characters with the character shapes generated by the first character shape generator so that the at least part of the document is displayed set in the typeface.
- the first transmitter transmits character information indicating the skeleton information for each of the characters.
- the first receiver receives skeleton information for each of the characters.
- the second character shape generator generates character shapes for the characters for which the first receiver receives the skeleton information.
- the character shapes are generated in response to the received skeleton information and in response to shape generation information.
- the second display displays the character shapes generated by the second character shape generator so that the at least part of the document is displayed set in the typeface.
- the second character shape generator may include a memory in which predetermined shape generation information is stored and the shape generation information in response to which the second character shape generator generates the character shapes may include the predetermined shape generation information.
- the character information transmitted by the first transmitter may include shape generation information
- the receiver may additionally receive the shape generation information transmitted by the first transmitter
- the second character shape generator may generate the character shapes in response to the shape generation information received by the first receiver.
- Each of the characters may include a character element having a skeleton defined by skeleton points, and the skeleton information may includes position information and connection information.
- the position information indicates the position of each of the skeleton points, and the connection information indicates how ones of the skeleton points are interconnected when the number of skeleton points defining the skeleton exceeds two.
- Each of the characters may include a character element having a skeleton and the shape generation information may include information defining the shape to be applied to the skeleton of the character element.
- the system may additionally comprise a network interconnecting the first transmitter and the first receiver.
- FIG. 1 is a schematic diagram of a first embodiment of the document display system according to the invention.
- FIG. 2A shows the skeleton points of the skeleton information for the Japanese kanji character "KI.”
- FIG. 2B shows how the shape of a portion of the kanji character "KI" is generated.
- FIG. 3 shows the state of each partial shape positioned at the skeleton points based on the shape generation information for the kanji character "KI" and connects these partial shapes with each skeleton component as a unit.
- FIG. 4 is a schematic diagram of a second embodiment of the document display system according to the invention.
- FIG. 5 is a schematic diagram of a third embodiment of the document display system according to the invention.
- the receiving apparatus connected to the network includes a shape generating engine that generates character shapes in response to skeleton information and shape generation information.
- the character shape may be the shape of one entire character or may be the shape of an element of the character. Normally, to create the shape of an entire character, the shape of the character is built from the shapes of a number of character elements. The shape of each character element is generated in response to skeleton information and shape generation information for the character element.
- each character element can be regarded as being composed of a skeleton and a shape.
- the skeleton defines the topology of the character element.
- the skeleton of the letter "l” may be defined by two skeleton points, one vertically above the other.
- Shape defines the appearance of the character element.
- the letter “l” in the font Times New Roman and the letter “l” in the font Arial have the same skeletons but have different shapes, the former having a more complex shape than the latter.
- the skeleton information of each character element is composed of position information.
- the position information indicates the position of each skeleton point defining the skeleton of the character element.
- skeleton points are required to define the skeleton of a character element, but one skeleton point may suffice.
- the skeleton of the period (.) may be defined with one skeleton point, for example.
- the skeleton points are determined according to the skeleton of the character element.
- the skeleton points are located at the ends of the skeleton, at connections between the skeletons of connecting character elements, at points at which the skeleton bends, or at points that define a curvature of the skeleton.
- the character skeleton i.e., the skeleton of the entire character, is determined taking into consideration the ends, connections, bending points and curves.
- the position information of the character skeleton is determined by projecting the character onto a two-dimensional coordinate system, as will be described in more detail below.
- the character skeleton is defined by two or more skeleton points
- additional information that defines the lines connecting specific groups of skeleton points can be included.
- This connecting line information may be related to the character skeleton of the entire character or may be related to the skeleton of each character element.
- the information indicates which skeleton point can be connected to which other skeleton point or which skeleton component can be created to create the character skeleton.
- Supplemental information may also be included in the skeleton information. Such information can indicate that a specific pair of skeleton points is connected by a straight line or is connected by curved line of a certain curvature, for example.
- the shape generation information is information related to generating the shapes that will be applied to the various skeletons.
- This information can indicate the shape in the neighborhood of the skeleton points of the character and the width of the character element that extends between the skeleton points.
- the information can indicate the shape of the skeleton component ends.
- the receiving apparatus can receive through the network from the sending apparatus as the character information for each character forming the document (a) the skeleton information and the shape generation information, or (b) only the skeleton information.
- the character shape generating engine When the skeleton information and the shape generation information are received, the character shape generating engine generates the shape of each character in response to the skeleton information and the shape generation information received with the skeleton information. When only the skeleton information is received, the character shape generating engine generates the character shape in response to the received skeleton information and additionally in response to predetermined shape generation information stored in the receiving apparatus.
- the receiving apparatus can create the shape of each character forming the document and can edit the displayed document even when the received document is set in a font that does not exist in the receiving apparatus itself.
- the size of the memory in the receiving apparatus is not dictated by the need to store a large number of fonts.
- the character shape generating engine only generates the shape of the character. Consequently, the hardware and software needed in the receiving apparatus to provide the character shape generating engine can be relatively simple.
- the character information may or may not include a code for each character forming the document.
- the memory of the receiving apparatus can store the character shapes generated for previously-received characters linked to the respective character codes. This allows newly-received characters to be displayed with already generated character shapes if the character has been received previously.
- the document display system stores character information for various fonts in the host device or the font server connected to the network.
- the character information includes skeleton information and shape generation information for each character in the character set rendered in the font. If the document received from the sending apparatus is created from fonts not available on the receiving apparatus, the receiving apparatus can demand the above-mentioned character information for the fonts it requires from the host device or the font server. The receiving apparatus can then display the document by creating the character shapes using the procedure described above.
- FIG. 1 is a schematic diagram showing a first embodiment of a document display system 10 according to the invention.
- the sending apparatus 11 and the receiving apparatus 21 are connected to the network 100.
- the Mincho typeface for the Japanese language is stored in the sending apparatus 11, but the receiving apparatus 21 lacks this typeface.
- the receiving apparatus 21 receives document data from the sending apparatus 11 through the network 100 and displays the document in the Mincho typeface.
- the document data are stored in the memory 12 of the sending apparatus 11 as a file with a file name of the form xxx.TXT.
- the xxx.TXT file contains a character code CHR for each character of the document, and the character information C -- INFO.
- the character information is composed of skeleton information B -- INFO corresponding to each character code CHR and shape generation information POG -- INFO corresponding to each character element.
- the sending apparatus includes the master display 14.
- the master display displays the characters indicated by the character codes CHR in the form specified by the skeleton information B -- INFO and shape generation information POG -- INFO.
- the document set in the Mincho typeface and stored in the xxx.TXT file was displayed using the master display 14 when it was originally created.
- the character shape generating engine 23 resides in the receiving apparatus 21.
- the receiving apparatus also includes the slave display 24.
- the character shape generating engine can reproduce each character in the xxx.TXT document in the original form in which it was displayed by the master display 14.
- the character shape generating engine reproduces each character in its original form in response to the skeleton information B -- INFO and the shape generation information POG -- INFO corresponding to the character code CHR of the character.
- the receiving apparatus 21 receives the character code CHR, the skeleton information B -- INFO, and shape generation information POG -- INFO for each character in the xxx.TXT file from the sending apparatus 11 through the network 100.
- the receiving apparatus uses the character shape generating engine 23 to reproduce each character in its original form.
- the slave display 24 displays the document using the reproduced character forms.
- the receiving apparatus 21 displays the kanji character "KI” specified by the Japanese Industrial Standard (JIS) character code CHR 6A48 in detail.
- the complete character 100 is shown in FIG. 3.
- the character is composed of seven character elements 101, 103, 105, 107, 109 and 111 in the order in which the character would be written by hand.
- the skeleton point information B -- INFO also includes connecting line information.
- the connecting line information indicates the skeletons of the character elements of the character "KI.”
- the skeletons of the character elements 101, 103, 105, 107, 109 and 111 are indicated by (P1, P2, P3), (P4, P5), (P6, P7), (P8, P9, P10, P11, P12), (P13, P14, P15), and (P16, P17, P18), respectively.
- several skeleton points define the skeleton of a character element such as a horizontal line, a vertical line, a wipe, a splash, etc.
- some of the skeletons that form the skeleton character are formed by interconnecting lower-level skeletons.
- the skeleton of the character "KI” is formed based on the connecting line information and the coordinates of the skeleton points (X i , Y i ).
- the shape generation information POG -- INFO includes partial shape generation information that defines the shape of the character elements near the skeleton points P1 to P18.
- the skeleton points and the partial shape generation information ⁇ 1 to ⁇ 6 for the character "KI” have the following correspondences shown in FIG. 3:
- the skeleton information B -- INFO and the shape generation information POG -- INFO for the character "KI” are described in the groups written below.
- the character information C -- INFO includes additional information such as bold and italics. In the first embodiment, such additional information is not included in the character information C -- INFO to simplify the explanation.
- the character shape generating engine 23 uses the character information C -- INFO, i.e., the skeleton information B -- INFO and the shape generation information POG -- INFO, and displays the character "KI” by executing the contents of lines 10, 20, 30, 40, 50 and 60 set forth above.
- the character shape generating engine 23 reproduces the shape of the character in units of the skeletons of the character elements in response to the partial shape generation information assigned to each skeleton.
- al includes the coordinate point information A1, A2, A3, A4, and A5 that defines the shape of the character element near the skeleton point P1
- ⁇ 2 includes the coordinate point information A6 and A10 that defines the shape of the character element near the skeleton point P2
- ⁇ 3 includes the coordinate point information A7, A8, and A9 that defines the shape of the character element near the skeleton point P3.
- the shape for the skeleton located by P1, P2, and P3 are formed in the order of A1 ⁇ A2 . . . A10 ⁇ A1.
- the character shape generating engine 23 executing lines 20, 30, 40, 50 and 60 respectively defines the shapes of the character elements 103, 105, 107, 109 and 111 of the character "KI.”
- a character shape is reproduced by the character shape generating engine 23 after the receiving apparatus 21 has received the file xxx.TXT from the sending apparatus 11. And also, the character shape generating engine 23 reproduces one after another the above-mentioned character shapes for the characters whose skeleton information B -- INFO and shape generation information POG -- INFO are received.
- the receiving apparatus 21 receives the character codes CHR and their corresponding skeleton information B -- INFO and shape generation information POG -- INFO from the sending apparatus 11. Therefore, after the character shape generating engine 23 has generated the character shape of each character whose character information has been received by the receiving apparatus, the receiving apparatus can store the resulting character shape in the memory 22 linked to the respective character code CHR. Then, when the receiving apparatus receives a character code corresponding to a character shape it has stored, it can simply retrieve the character shape from the memory 22. The character shape generating engine does not have to reproduce such characters again.
- the characters are displayed on the slave display 24 in the Mincho typeface.
- the characters can alternatively be displayed in the Gothic typeface.
- the skeleton information B -- INFO of each character is common to both the Mincho and Gothic typefaces. Only the shape generation information POG -- INFO is different for the two typefaces. This arrangement significantly decreases the number of data required to transfer the document.
- Mincho typefaces There are many kinds of Mincho typefaces, but only the shape generation information need be changed to set the document in a different kind of Mincho typeface from the one shown in this embodiment. There is no need to change the skeleton information .
- FIG. 4 shows a second embodiment 30 of a document display system according to the invention.
- the sending apparatus 31, the receiving apparatus 41 equipped with the character shape generating engine 43, and the font server 51 are connected to the network 100.
- a document created set in a Japanese font in the sending apparatus 31 is displayed on the receiving apparatus 41 that does not have Japanese fonts.
- the sending apparatus 31 creates a file having a filename of the form xxx. -- JM and stores this document in the memory 32.
- This file contains character codes CHR only. Skeleton information B -- INFO and the shape generation information POG -- INFO are not included.
- the skeleton information B -- INFO and the shape generation information POG -- NFO are stored in the memory 52 of the font server 51.
- the xxx. -- JM file additionally includes identification information that indicates that the document is written in Japanese and is set in the Mincho font.
- the receiving apparatus 41 When the receiving apparatus 41 receives the xxx. -- JM file from the sending apparatus 31, the receiving apparatus additionally demands and receives the skeleton information B -- INFO and the shape generation information POG -- INFO required to display the document in the Japanese Mincho font from the memory 52 of the font server 51.
- the character shape generating engine 43 of the receiving apparatus 41 generates the character shapes from the skeleton information B INFO and the shape generation information POG -- INFO and displays them on the slave display 44.
- the receiving apparatus can store in the memory 42 the shapes of the characters reproduced by character shape generating engine 43 linked to the respective character code to save the character shape generating engine from having to generate the character shape again when the character code is later received.
- FIG. 5 shows the third embodiment 60 of a document display system according to the invention.
- the sending apparatus 61, the receiving apparatus 71 equipped with the character shape generating engine 73, and the font server 81 are connected to the network 100.
- a document set in a Japanese font in the sending apparatus 61 is displayed by the receiving apparatus 71 that does not have a Japanese font.
- the sending apparatus 61 creates a file having a filename of the form xxx. -- JM and stores this document in the memory 62.
- This file contains character codes CHR only. Skeleton information B -- INFO and the shape generation information POG -- INFO are not included.
- the document includes the identification information that indicates that the document is written in Japanese and is set in the Mincho font.
- Skeleton information B -- INFO corresponding to the character codes CHR is stored in the memory 82 of the font server 81.
- Shape generation information POG -- INFO is stored in the memory 72 of the receiving apparatus 71.
- the receiving apparatus 71 can assign correspondences between character codes CHR the skeleton points of the respective character skeleton, and shape generation information POG -- INFO defining many partial shapes.
- the receiving apparatus 71 When the receiving apparatus 71 receives the xxx. -- JM file from the sending apparatus 61, the receiving apparatus 71 additionally demands and receives the skeleton information B -- INFO for the Japanese Mincho font from the memory 82 of the font server 81.
- the character shape generating engine 73 of the receiving apparatus 71 reproduces character shapes in response to the skeleton information B -- INFO received from the font server 81 and the shape generation information POG -- INFO stored in the receiving apparatus 71 and relating to partial shapes corresponding to the skeleton points of the character skeleton and displays the character shapes on the slave display 74.
- the character shape generating engine 73 of the receiving apparatus 71 does not have to generate new character shapes for characters that have previously been received.
- the document display system enables a document to be displayed set in its original font at high speed and with the transfer of relatively few data even if the receiving apparatus does not have the fonts used in the document.
- the invention also enables a document to be displayed at high speed and with the transfer of relatively few data even if the document includes characters not normally used by the user of the receiving apparatus.
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Abstract
Description
Claims (11)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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JP8-314238 | 1996-11-11 | ||
JP31423896A JP3754153B2 (en) | 1996-11-11 | 1996-11-11 | Document display system in network |
Publications (1)
Publication Number | Publication Date |
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US6054998A true US6054998A (en) | 2000-04-25 |
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US08/968,962 Expired - Lifetime US6054998A (en) | 1996-11-11 | 1997-11-12 | Document display system for displaying documents set in fonts not native to a display device |
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US (1) | US6054998A (en) |
JP (1) | JP3754153B2 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1069549A1 (en) * | 1999-02-08 | 2001-01-17 | Polytech Co., Ltd. | Character information transmission system |
US6324500B1 (en) * | 1997-11-14 | 2001-11-27 | International Business Machines Corporation | Method and system for the international support of internet web pages |
US20030014545A1 (en) * | 2001-07-12 | 2003-01-16 | International Business Machines Corporation | System and method for presenting text upon the display of a server that employs an X window graphical interface |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2002312279A (en) * | 2001-04-11 | 2002-10-25 | Kenwood Corp | Information delivery system, gateway server, delivering method thereof, and information communicating terminal |
JP4630531B2 (en) | 2003-10-03 | 2011-02-09 | 株式会社メガチップス | 3D character mail system |
JP5281041B2 (en) * | 2010-06-14 | 2013-09-04 | 株式会社メガチップス | 3D character mail system |
JP5861229B1 (en) * | 2015-04-15 | 2016-02-16 | 株式会社システム中部 | Handwritten font distribution system and handwritten font distribution method |
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Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6324500B1 (en) * | 1997-11-14 | 2001-11-27 | International Business Machines Corporation | Method and system for the international support of internet web pages |
EP1069549A1 (en) * | 1999-02-08 | 2001-01-17 | Polytech Co., Ltd. | Character information transmission system |
EP1069549A4 (en) * | 1999-02-08 | 2002-07-24 | Polytech Co Ltd | Character information transmission system |
US20030014545A1 (en) * | 2001-07-12 | 2003-01-16 | International Business Machines Corporation | System and method for presenting text upon the display of a server that employs an X window graphical interface |
US6922812B2 (en) * | 2001-07-12 | 2005-07-26 | International Business Machines Corp. | System and method for presenting text upon the display of a server that employs and X window graphical interface |
Also Published As
Publication number | Publication date |
---|---|
JP3754153B2 (en) | 2006-03-08 |
JPH10149354A (en) | 1998-06-02 |
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